Drilling device



v1618,900 Feb-22"1927 c. woLKl-:RsToRr-ER l DRILLING DEVICE Filed May"7. 1926 2 Sheets-Sheetv 2 INVENTOR W' ATTORNEY the drill.

Patented' Feb. 22, 1927.

'PATENT OFFICE.

CHARLES WOLKERSTORFER, OF ST. PAUL, MINNESOTA.

DRILLING DEVICE.

Application led May 7, 1926.

follow the pattern or die as it is being ro tated. v

This invention also consists in certain other features of constructionand in the 4combination and arrangement of the several parts, vto behereinafter full)7 described, il-A lustrated in the accompanyingdrawings and specifically pointed out in the appended claim. f

In describing my invention in detail, reference will be had tov theaccompanying drawings wherein like characters denote like. orcorresponding parts throughout. the several views, and in which Figure 1is a sectional view through the device, withv parts in elevation.

Figure 2 is a'view showing the various parts of the device disassembled.

' Figure 3 is a section-on line 3-3 of Figure 1. y

Figure 4 is a section on line 4-4 ot Figure 1.

Figure 5 is aplan view of a drill for making a hexagonal hole.

Figure 6 is a. view of the die for use with this bit.

Figure 7 is a plan view of a bit for makin y asquare hole. l y

Tigu're 8 is a View of the die for use with this bit.

In these views, lindicates a casing which is of cylindrical shape withits lower end partly closed but leaving a central opening 2. Acylindrical member 3 fits in the upper portion of the casing and is heldin place by the set screw 4. This member is provided with a. socket. 5for receiving the shank 6 of The bottom of tie member 3 is provided witha diametrically` arranged groove 7. A disk 8 has a diametricallyarranged rib 9 engaging the groove 7 and it has a rib 10 on its bottomface which is ar.

ranged at right angles to the rib 9 and this rib 10 engages a groove 11formed in the head 12 of the chuck 13 which receives the shank 14 of thebit 15. A set screw 16 holds Serial No. 107.431.

the bit in the chuck andthis screw also holds a. collar 17 on the lowerpart of the chuck, this collar covering the opening 2.and preventingchips and the like from entering the device.

Figure 5 shows a bit 15 for making hexagonal holes and Figure 6 shows at18 a die for use with this bit.

.Fgure 7 is a plan view of thebit 15 and lFigre 8 shows at 18 a die usedwith this )it As shown in Figure 1, one of the wings ot the bit 15 ismade longer than the other, as shown at 19. y

From'the foregoing, it will be seen that as the device is rotated, thebit can followthe walls of the hole in the pattern or die through thesliding connection between'the chuck and member 3 afforded by the disk8.

`With this invention, square and hexagonal holes' can be quickly vmadeby a brace or similar tool for giving the device a rotary Inotion.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

' I desire it to be understood lthat I may make changes in theyconstruction and in the combination and arrangement of the severalparts, provided that such changes fall within the scope of the appendedclaim.

What I claim is A device. of the class described comprising a casinghaving an opening in its bottom, a

cylindrical member. fitting 1n the casing and.

mounted in thecasing and having a. rib on Y its upper 'face engaging thegroove, a rib on the lower face of the disk and arranged at right anglesto the first rib, a headed chuck having its body passing through thehole inv the bottom of the casing,- with its head resting upon the saidbottom of the casing, said head having a groove therein for recelvingthe lower rib on the disk, a bit carried by the chuck and a collar onthe lower part of the chuck and detachably connected thereto andengaging the bottom of the casing.

In testimony whereof I affix m signature.

CHARLES WOLKERS ORFER.

